Lie Detector App or Lie detection Prank is just a prank app which will not tell you whether a person is telling truth or lies like Polygraph. Use Lie Detector Test Fingerprint Prank to test if your friends lie or tell the truth for fun. Lie Detector Test Fingerprint Prank scans your finger print and determines TRUE(real), or FALSE (lie).

Tap and hold your finger while speaking on the lie detector fingerprint scan machine. After detection, the Lie detector will test lies based on your finger print.